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The effect of temperature on the radial distribution function for iron in native horse spleen ferritin
Journal article   Peer reviewed

The effect of temperature on the radial distribution function for iron in native horse spleen ferritin

K.R. Bauchspieβ, T.G. St Pierre and J. Webb
Physica B: Condensed Matter, Vol.208-209, pp.545-546
1995
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Abstract

Iron K-edge X-ray absorption spectra were recorded for a sample of freeze-dried horse spleen ferritin over a range of temperatures from 40 to 300 K. Gaussian-type radial distribution functions were fitted to the data from all temperatures simultaneously and the obtained mean-square relative displacements σ2 (EXAFS Debye-Waller factors) were fitted using an Einstein model. For iron atoms in the second and/or third coordination shell an Einstein temperature of 330 ± 20 K was obtained. If oxygen was assumed in the second or third shell, its Einstein temperature was 460 ± 20 K. This indicates that the core of ferritin may have a somewhat more rigid structure than those of previously studied ferritin analogues (polysaccharide iron complexes).

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Citation topics
1 Clinical & Life Sciences
1.184 Physiology & Metals
1.184.573 Iron Metabolism
Web Of Science research areas
Physics, Condensed Matter
ESI research areas
Physics
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